What is the name of the device used to step up or step down alternating voltages based on mutual induction?

💡 Solution & Explanation

A transformer operates on Faraday's law of electromagnetic induction through mutual induction between primary and secondary coils to increase or decrease alternating voltage levels efficiently. Dynamos convert mechanical energy into electrical energy, whereas rectifiers convert alternating current into direct current. Transformers only function with alternating current because changing magnetic flux is essential for inducing current in the secondary winding.